| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2019 Arm Limited |
| * Original author: Dave Martin <Dave.Martin@arm.com> |
| */ |
| |
| #ifndef ASSEMBLER_H |
| #define ASSEMBLER_H |
| |
| #define NT_GNU_PROPERTY_TYPE_0 5 |
| #define GNU_PROPERTY_AARCH64_FEATURE_1_AND 0xc0000000 |
| |
| /* Bits for GNU_PROPERTY_AARCH64_FEATURE_1_BTI */ |
| #define GNU_PROPERTY_AARCH64_FEATURE_1_BTI (1U << 0) |
| #define GNU_PROPERTY_AARCH64_FEATURE_1_PAC (1U << 1) |
| |
| |
| .macro startfn name:req |
| .globl \name |
| \name: |
| .macro endfn |
| .size \name, . - \name |
| .type \name, @function |
| .purgem endfn |
| .endm |
| .endm |
| |
| .macro emit_aarch64_feature_1_and |
| .pushsection .note.gnu.property, "a" |
| .align 3 |
| .long 2f - 1f |
| .long 6f - 3f |
| .long NT_GNU_PROPERTY_TYPE_0 |
| 1: .string "GNU" |
| 2: |
| .align 3 |
| 3: .long GNU_PROPERTY_AARCH64_FEATURE_1_AND |
| .long 5f - 4f |
| 4: |
| #if BTI |
| .long GNU_PROPERTY_AARCH64_FEATURE_1_PAC | \ |
| GNU_PROPERTY_AARCH64_FEATURE_1_BTI |
| #else |
| .long 0 |
| #endif |
| 5: |
| .align 3 |
| 6: |
| .popsection |
| .endm |
| |
| .macro paciasp |
| hint 0x19 |
| .endm |
| |
| .macro autiasp |
| hint 0x1d |
| .endm |
| |
| .macro __bti_ |
| hint 0x20 |
| .endm |
| |
| .macro __bti_c |
| hint 0x22 |
| .endm |
| |
| .macro __bti_j |
| hint 0x24 |
| .endm |
| |
| .macro __bti_jc |
| hint 0x26 |
| .endm |
| |
| .macro bti what= |
| __bti_\what |
| .endm |
| |
| #endif /* ! ASSEMBLER_H */ |
